1. Hydrochloric acid served as a stabilizer or peptizer in the preparation and preservation of magnetic nano-particles, but the role and end produce of hydrochloric acid are not clear.

2. A study was made on the application of peptizer SJ 103 to NR compound.

3. The influence of peptizer B on Mooney viscosity , plasticity and heat aging property of NR was investigated.

4. The influence of peptizer B on Mooney viscosity, plasticity and heat aging property of was investigated.

5. And the degradation pace can be improved notably by the joining of peptizer.